Apparatus for forming plate or sheet glass.



No. 667.007. -Patented lan. 29, |90I. L. H. DOLAN. APPARATUS FUR FORMINGPLATE 0B SHEET GLASS (Application lei Jan. 12, 1900.)

6 Sheets-Sheet l.

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No. 667;,007'." l Patenteud'lan. 29, |90l. L. H. DLAN.

APPARATUS FOR FORMING PLATE 0H SHEET GLASS.

(Application led Jan. 12, 1900.) (No Model.) 6 Sheets-Sheet 2.

W/7'NESSES /N VENTOH TH: Nonms Pfrzns ca. PHoToLlTHn.. WASHINGTON. n. c.

v Patanted Jan. 29, |90I. L. H. DOLAN.

APPARATUS FUR FORMING PLATE 0R SHEET GLASS.

(Application xed Jan. 12, 1900A a u 11| .M Q :FLE v ;:f n m 6 EW L?? r MI w..... -.l l t., 1:5;

(No Model.)

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No. 667,007. Patentedf1an. 29, mol. L. H, DLAN. lAPPARATUS FORFOBMIIII?- PLATE UB SHEET GLASS.

(Application4 Bled Jan. 12, 1900.) (No Kodak) Patented lan. 29, |90I.

L. H. DOLAN. APPARATUS FOB FOBMING PLATE 0R SHEET GLASS.

(Application led Jgm. 12, 1900.)

(No Model.)

W/ TNE SSE S A 7TOHNEYS 1N: owns Penas co, PNoYuLITNo.. WASHINGTON, D.c.

Patented l an.

L. H. DLAN. APPARATUS FOR FOBMING PLATE 0B SHEET GLASS.

'cation filed Jan. 12, 1900.)

(N0 Model.)

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f ATENT FFICE.

Nrrnn `Tnrns LAWRENCE H. DOLAN, OF PENDLETON, INDIANA, ASSIGNOR OFONE-HALF TO ALBERT l5. TAYLOR, OF SAME PLACE.

APPARATUS FOR FO RNI ING PLATE OR SH EET G LASS.

SPECIFICATION forming part of Letters atent No. $67,007. dated J anulry29, 1901.

Application filed January 12, 1900. Serial No. 1,213. (No model.)

.To all whom t may concern:

Be it known that I, LAWRENCE H. DOLAN, a citizen of the United States,and a resident of Pendleton, in the county of Madison and 5 State ofIndiana, have invented a new and Improved Apparatus for Forming Plate orSheet Glass, f which the following is a full, clear, and exactdescription.

This invention relates to the manufacture io of sheet and plate glass,either fiat or bent into curved form.

The object of my invention is to provide a novel apparatus for theformation of sheet and plate glass, either fiat, curved, or corrurgated', which Awill enable the rapid and perfect manufacture of suchproducts from molten glass without the use of a blowing-tube or castinga plate of glass by the pouring of melted glass upon a bed-plate or intoa mold,

zo the new device greatly facilitating the production of large sheets orplates of glass of uniform thickness and ne finish rapidly and devoid ofimperfections and at a low cost.

The invention consists in the novel means for the manufacture of sheetor plate glass, as hereinafter described, and defined in the appendedclaims.

Theaccompanying drawings illustrate the preferred mechanical deviceprovided for carrying my invention into effect, similar characters ot'reference indicating corresponding parts in all the gu res.

Figure 1 is a plan View of the sheet or plate Fig. 2 is a side ele- Fig.3 is a detached plan view of a fluid-distributing device that is a glassforming machine. vation of the same.

detail of the machine. Fig. 4 is a transverse sectional viewsubstantially on the line 4 4 in Fig. 6. Fig. 5 is an end elevation ofoperative details seen in the direction of the Fig. 6 is a sectionalside` view substantially on the line 6 6 in Fig. 1.

arrow 0c in Fig. 6.

Fig. 7 is a plan view of the device, exemplifying the formation of anelongated sheet or plate of glass. Fig. 8 is a sectional side elevationtaken substantially on the line 8 8 in Fig. 7. Fig. 9 is apartly-sectional inner side elevation of a portion of the machineframeand details thereon, taken substantially on the line 9 9 in Fig. 7.

transverse partly sectional elevation substantially on the line 10 10 inFig. 2. Fig.

Fig. 10 is a 11 is a transverse partly-sectional elevation essentiallyon the line 11 11 in Fig. 2. Fig.

12 is a cross-section of the machine-frame and 55 bed thereon and of oneform of plate-former support-ed by the bed. Fig. 13 is a perspectiveview of a glass gathering and drawing frame employed in forming flatsheets or plates of glass. Fig. 14 is a perspective view 6o of agathering and drawing frame used in forming transversely-bent sheets orplates of glass. Fig. 15 isa sectional plan view of a glass-furnace anda plan view of a laterallyextended glass-holder communicating with thefurnace and adapted to receive the drawing-frame shown in Fig. 13. Fig.16 is a view similar to Fig. 15, the glass-holder being adapted toreceive the drawing-frame shown in Fig- 14. Fig. 17 is a top edge viewof the 7o drawing-frame shown in Fig. 13, and Fig. 18

is a top edge view of the drawing-frame shown in Fig. 14.

The principle upon which is based the 0peration of my apparatus formanufacturing sheet and plate glass, briefly described, consists indrawing a wide or narrow sheet or plate of glass from a suitablereservoir containing molten glass, controlling the tempera ture of theglass as it is in process of forma- 8o tion into a plate or sheet,imposing the drawn sheet or plate upon an appropriate formingplatesupported upon a frame or the like, and providing means to render theside edges of the glass sheet or plate true, and also providing means todetach the cooling plate or sheet from the mass of glass held in thereservoir.

The glassfurnace 19 may be of any preferred form which will be welladapted for melting a mass of glass and keeping it in a 9o moltencondition. At one side of the furnace 19 a reservoir or holder 20 islaterally extended therefrom, in open communication with the interior ofsaid furnace near its base, so that the molten glass will pass into t-heholder, and any suitable means may be employed to maintain the glass inthe holder at a proper temperature.` A detachable cover-plate 2Oa isimposed upon the otherwise open top of the l holder 20, and in saidcover plate a slot is roo formed,which may be straight in the side wallsthereof, as represented at 20 in Fig. 15, or be formed as the are of acircle, as shown in Fig. 16 at 20, said slots being of such relativedimensions, respectively, as will permit the free movement therethroughof the gatheringframe shown in Figs. 13 and 17 or the gathing-framerepresented in Figs. 14C and 18, for a purpose which will behereinafterdescribed.

rFhe machine for drawing glass plates or sheets from the glass-holder 2Othrough a slot or 2l)C in its top preferably is constructed as follows:An elongated rectangular frame 21, proportioned in its dimensions t-osuit the size of the sheets or plates of glass to be manufactured, ispositioned near one end of and above the glass-holder 20, so that theslot in the cover 2Oa will be disposed transversely of themachine-frame,as indicated in Figs. 1 and 7.Theheightoftheframe21isproportionedto afford proper space between thecover 20 and the horizontal top members of the machineframe, and, asshown said, frame is open above the glass-holder 20. Extending from apoint near the glass-holder 2O to the left-hand end of the frame 21, abed-piece 22 is secured upon said frame and serves as a table forsupport and guidance of a longitudinally-removable forming-plate 23 or24. The forming-plates may be either flat on the top surface, as shownat 23 in Figs. 4 and 5, or may have a convex top surface, consideredtransversely thereof,

as indicated in Fig. 12, and it is to be understood that saidforming-plate may be given a corrugated top surface, if this is desired.The forming-plate, having any preferred form at its top surface, is tobe seated upon the top of the bed-piece or table 22, and the side edgesof the elongated forming-plate should be parallel with each other andmay with advantage have a loose engagement with guides formed on orsecured upon the bed-piece, so as to prevent a lateral displacement ofthe forming-plate.

To facilitate the longitudinal movement of a forming-plate 23 or 2-1 inplacing or removing the same upon or from the bed 22, a toothed rack@may be formed orsecured upon the lower side of each forming-plate, ator near the transverse center thereof, and a pinion 25a, mounted andsecured upon the rotatable transverse shaft 25,is meshed with thetoothed rack when a forming-plate is slid endwise upon the outer end ofthe bed 22, which will enable a convenient placement of the formingplateby a manipulation of the crank-handle 25h, that is fixed upon the outerextremity of the shaft 25. It will be seen that by the rotation of thecrank-handle 25b in proper direction the forming-plate that is locatedupon the bed 22 may be displaced therefrom and another forming-platesubstituted therefor having a like top surface or of different shape, asmay be desired.

Transversely of the main frame 21`and directly above the glass-holder 2Otwo preferably hollow shafts 26 27 are journaled in boxes carried byside members of said frame. The hollow shaft 26, which is nearest to thetransverse edge of the bed-piece 22, is held to rotate in the boxes b,which may be stationary and located in openings in the frame, asindicated in Figs. 9 and 1l. The otherhollow shaft 27 is journaled inboxes c, which are held to slide longitudinally of the side members ofthe main frame 2l, wherein openings c' may be formed, and fordurability, as well as convenience in manufacture, an elongated casingc2 may be provided for lining each opening c', as shown as to one box inFig. 9. To hold the boxes c slidably within the rectangular casings c2and the boxes b also in place, there maybe like capplates 21n provided,one for each upper side piece of the main frame 21 and removably securedthereon by screws or other means. Upon the uppersides of the boxes cwebs c3 project upward through longitudinal slots c, formed in thecap-plates 21, said webs respectively connecting the boxes c with thelower sides of the two similarly-toothed rack-bars 28, the teeth ofwhich project upwardly,as indicated in Fig. S). Two similar bracket-arms29 are held upon said members of the main frame 21 and have their freeends formed with bearings to receive the journal ends of a transverseshaft 30. Two similar gears 31 are respectively affixed upon the endportions of the shaft 30, which gears are held over the rack-bars 28 andhave toothed engagement therewith. A handlebar 32 or its equivalent ismounted and secured upon an eXtremityof the shaft 30, that projectsbeyond one of the gears 3l, and by a rocking manipulation of thehandle-bar the racks 28 and boxes c may be moved toward or from thehollow shaft 26, which of course will correspondingly move the hollowshaft 27.

Upon the hollow shafts 26 27 two spurgears 33 34 are respectivelysecured, preferably upon the side of the machine where the handle-bar 32is located, and it will be obvious that by the manipulation of said handle-bar these gears may be meshed together or be separated, as occasionmay require.

Two bracket-arms 35 are respectively secured upon the side members ofthe main frame, so as to project beyond the outer end of the bed-piece22, the free ends of said arms having box-bearings d, adapted to receivethe journal ends of the transverse sprocket-shaft 36, which are looselyheld therein. Upon the sprocket-shaft 36 two sprocket-gears 37 aresecured, respectively, adjacent to one of the bracket-arms 35, asindicated in Figs. ll and 7.

Two sprocket-gears 38 are mounted and affixed upon the hollow shaft 26in aliuement with the similar gears 37, and upon each pair of alinedgears an endless sprocket-chain 39 is mounted in taut condition. Acrank-handle 40 is secured upon the extremity of the shaft 26, whichprojects outside of the spurgear 33, or, if preferred, any equivalentdevice may be substituted for the crank-handle. It will be evident thatby a rotatable movement of the crank-handle 40 in the direction of thearrow z' in Fig. 2 the sprocket-chains 39 will be moved so that theirupper runs will travel toward the sprocket-gears 37.

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A gathering and drawing frame 42 is provided as an essential adjunct forthe formation of a flat sheet or plate of glass according to myinventionand is constructed essentially as follows: A gathering-bar e extendsacross the lower portion of the frame and near its ends is joined withthe depending side meinbers e', which are formed or secured upon atransverse top member of the frame. A pair of spaced collars e2 may beformed or aflixed upon the top cross-bar of the gathering-frame near itscenter for the retention of a link-bar 41 in connection with said topcross-bar, as shown in Fig. ll, the frame 42 being likewise shown inFig. 17. On the ends of the gathering-bar e transverse projections inthe form of short flanges or ears c3 project laterally therefrom, theseprojections serving to hold melted glass and bind a gathered charge ofglass upon the ends of the bar, as will be hereinafter more fullyexplained. A cross-bar 43 extends between the two sprocket-chains 39 andis secured by its ends thereto at opposite points, so as to dispose saidcross-bar at right angles to the runs of the chains, and upon thecross-bar 43 at or near its cent-er of length the remaining end of thelink-bar 41 is loosely secured. The relative proportions of thegathering-frame and link-bar are such as will permit these part-s to belowered by the down' ward movement of the chains 39 and crossbar 43 overthe sprocket-gears 38 and enter a proper distance Within theglass-holder 2O through the straight slot 20b in the cover-plate 20a,such an operation evidently resulting from a rotatable movement ofthecrank-handle 40, the gathering-frame being shown in position for itsdescent into the holder in Fig. l1.

Above the glass-holder 20 a fluid-jet device is positioned, the purposeof which is to throw hot or cold jets upon a sheet or plate of glasswhich is in process of formation. As shown, the jet device essentiallycomprises a tubular oblong body 44, to one side member 0f which theconduit-tube 45 is joined for conducting air or gaseous vapor to saidbody, and the latter is foraminated to provide a series of spacedperforations h on its inner side. An arched tubular member 44@L may bejoined to the side portion of the oblong body 44, which latter is tappedby the conduit-tube 45, and this attached member 44a also has a seriesof spaced perforations h formed in it for the escape of air or gaseousvapor therefrom. The conduit-tube 45 is hung from the lower side of thebed-piece 22 by the bracket 22 and also by its engagement with supports22", that are held transversely upon upright members of the main frame2l, as represented in Figs. 2, 6, and 8. Two supply-pipes 46 45L extendlaterally from the conduit-tu be 45 and are when complete ot' a lengthwhich permits their attachment, respectively, to a source of air-supplyunder pressure and an infiammable gas supply, also under pressure. Asuitable valve 47 is introduced in the air-supply pipe 46, and avalve 43is connected with the air-supply pipe 46a, these valves serving tocontrol the flow of gas or air in'to the tubular conduit 45. A valve 49may also be introduced in the conduit-tube 45, near the oblong body 44,to graduate the liow of fluid from its perfor-ations or cut off thefluid from said body. The conduit-tube 45 may with advantage be extendedfrom the hanger-bracket 22a to the outer end of the bed-piece 22 andhave a jointed section 45L held to rock thereon, this tu be-sectioncarrying a transverse jetpipe 45b and a valve 45C` the latter aliordingmeans to cut off the escape of gaseous vapor from the jet-pipe 45 orgraduate its discharge from the series of spaced perforationszl formedin the side thereof which is nearest to the end of the bed-piece 22.

Upon the hollow shaft 26 two similar scoring-wheels 50 areaffixed,respectively, near the opposite side members of the main frame21, and upon the hollow shaft 27 two scoringwheels 51 are secured, whichare respectively positioned in alinement with the wheels 50. Theperipheries of the scoring-wheels on one hollow shaft may have each arib projected therefrom, which ribs are directly opposite grooves formedone in each scoring-wheel that is fixed upon the other hollow shaft, sothat by a rocking movement of the handlebar 32 the scoring-wheels 51 onthe shaft 27 may be moved to engage with the wheels 50 on the othershaft 26.

In the operation of the complete apparatus if dat sheets or plates ofglass are to be formed the glass-holder 2O is supplied with moltenglasscomposition from the furnace 19 and the cover-plate having the straighttransverse slot 2Gb in it is placed upon the holder. The gathering-frame42 is now lowered into the holder 20, passing down through the slot 20h,this being effected by manipulation of the crank-handle 40 andconsequent longitudinal movement of the sprocket-chains 39 in thedirection of the arrow z in Fig. 1. When there is a coating of glassformed upon the cross-bar e and ears e3, due to the chilling of themelted glass by the cool bar, said gathering-bar and ears will be firmlyconnected with the molten composition held in the reservoir 20. A slowreversed movement of the crankhandle 40, or in the direction of thearrow z in Fig. 2, will draw the gathering-frame 42 upwardly and thenhorizontally toward the outer end of the forming-plate 23. A current ofcool air from the conduit-tube 45 is permitted to escape from thejet-orifices in the tubular body 44 and the arched piece 44a, and assaid body surrounds the slot 20b it Will be apparent that the air Vthusexpelled will project toward the'frame 42 as it rises from the holder20. A quantity of the hot glass composition will adhere to the chilledportion thereof that is fast to the gathering-frame, and the cool-aircurrent striking this adhering materialas it emerges from the slotin theholder cover-plate will render the glass vis- IOO IIO

cous by lowering its temperature a proper degree. The tenacity of thesheet or plate of glass thus started in formation will enable acontinuation of the operation to be efected by the slow rotation of thecrankhandle 40, as before mentioned, and will result in the drawing of asheet or plate of glass from the holder 2O up and then horizontally overthe forming-plate 23, whereon it will eventually rest and be renderedlevel. The formingplate 23 may have an asbestos-board covering securedupon its upper surface, as indicated at 2 3, to prevent a suddenchilling of the plate, it being essential that the glass sheet or plateshall cool gradually to prevent it from cracking. It is also feasible todispense with the asbestos covering 23 if the forming-plate is heatedsomewhat before it is placed in position on the bed-piece of themachine. lVhile the sheet or plate of glass is in process of formationthe scoring-wheels on the hollow shaft 2G will be in loose contacttherewith near the side edges of the glass and support the same. Thismechanism enables the sheet to be drawn of uniform width and thicknessand relieves the strain from the gathering-bar e. Simultaneously withthe drawing of molten glass from the holder 2O the movable hollow shaft27 and scoring-wheels on it are moved toward the scoring-wheels on theshaft 2G, so that the scoring-wheels on the shaft 27 will forcibly bearupon the soft sheet or plate of glass as it is being upwardly drawn. Thebeads and grooves on the scoring-wheels 50 5l will cause the hot sheetor plate of glass as it is moving to be indented or scored near eachside edge thereof, so that parallel and straight edges may be producedif the material outside of the scores m on the sheet or plate A isremoved by breaking this surplus material away from the plate or sheetof glass where it is scored. (See Fig. 7.) As the drawing-frame 42 hasbeen moved to the outer end of the forming-plate 23 when aglass sheet orplate A is completed and rests upon the forming-plate, it is essentialthat safe means be provided to detach the frame near its gathering-bar efrom the glass plate. To effect this, the jointed section 45 of theconduit-tube 45 is rocked upwardly into the position indicated in Figs.l, 5, and 6, so that the jet-pipe 451 will bc disposed above and near tothe drawing-frame 42. A flow of mixed air and gas is now introduced intothe conduit-tube 45 from the supply-pipes 46 46, and this iniiammablegaseous Vapor is ignited as it escapes from the jet-orifices in the body44 and jetpipe 45h. The heat evolved by combustion of the infiammahleVapor that escapes in jets from the ring 44 and pipe 45b will speedilymelt the glassfrom the drawing-frame and also sever the sheet from thestub portion that projects up from the holder 2O through the slot 20",and in this manner the completed sheet or plate of glass is detachedfrom the drawing-frame and glass in the holder 20. It will be evidentthat the stub portion which has been cut from the plate or sheet ofglass will drop by its gravity back into the molten material and becomemelted again.

It is to be understood that a proper number of formingplates 23 is to besupplied, and when a plate or sheet of glass has been formed on one ofsaid plates the plate of glass and its support maybe removed from thebedpiece 22 and placed in an annealing-oven, if this is desired. Aduplicate forming-plate is then placed in position on the bed-piece fora renewal of the operation, so that the manufacture of the sheets 0rplates of glass may be continued indefinitely. Of course the iinishedsheet or plate of glass may be rendered square and true on the ends andcut into pieces, if desired.

If it is desired to give plates or sheets of glass a transversely-curvedbody, the forming plate or plates are convexed in cross-seetion upontheir upper surface a proper degree to give the required curvature tothe sheets or plates of glass.

The gathering and drawing frame 42 is employed when bent glass platesare to be manufactured, and, as shown in Figs. 14 and 15, thisdrawing-frame is substantially similar to the drawing-frame 42, with theexception that the gathering-barnJ thereon is laterally curved to adaptit to pass freely through the curved slot 20 in the cover-plate 20a. Inoperation the drawing-frame 42 is connected to the cross-bar 43, asalready described with regard to the drawing-frame 42, and the concaveside of the gathering-bar n is arranged to contact with the convex topsurface of the forming-plate 24 as this drawing-frame is movedlengthwise of the forming-plate. The plate or sheet of glass initiallyformed by the curved drawing-bar n on the frame 42 will assume thecurvature of said bar, and as the sheet or plate is drawn over theconvex surface of the forming-plate 24 the hot glass plate will conformto the conVeXity of the forming-plate and take its shape incross-section therefrom. It is to be understood that a plurality of theforming-plates 24 may be supplied to be used successively, as specifiedwith regard to the forming-plates 23, and also that the means fordetachment of a completed plate or sheet of glass from glass in theholder 2O and from the drawing-frame 42, already described, may withadvantage be employed.

In further explanation of the scoring device comprising the pairedwheels 50 51 and shafts 26 27, rotatably supporting said wheels, it ispreferred to render these shafts hollow and open at their ends, thuspermitting the free passage of air therethrough to prevent the shaftsfrom becoming excessively hot. Furthermore, if found necessary for thebetter support of the plastic-sheet or plate of glass as it passes upfrom the holder 2O duplicates of the sets of scoring-wheels 50 5l may beheld to rotate with a pair of transverse shafts mounted loosely upon asuitable IIO IZO

support, these supplement-ary wheels and Shafts carrying them, it'employed, being located between those shown and the top ot` the holder,as indicated in dotted lines at 50a in Fig. S.

With the improved apparatus sheets or plates of glass may be formed ot'a desired width and length defined by the dimensions of the apparaus,and the completed sheets or plates, which are produced rapidly, will bemeasurably perfect and require little labor to finish them.

By my improved apparatus the plates of glass are bent while hot to adesired curvature and at one operation, thereby saving time and labor.

ln the drawings I have shown one machine for drawing sheets or plates ofglass; but, as indicated in Fig. l, the main frame 2l may be extended atone end for the accommodation of a complete duplicate machine to beemployed in connection with another furnace and glassholder, so that theplant for the manufact-ure of glass sheets or plates may be increased todouble its capacity if this is necessary.

It is to be understood that some minor details of construction may bechanged in form and arrangement Without exceeding the scope of theinvention. Hence I do not desire t'o limit myself to the precise shapesand arrangement of parts shown.

Having thus described my invention, I claim as new and desire to secureby Letters Patentl. In a sheet or plate glass forming apparatus, aholder for molten glass, a form for shaping the sheet or plate of glass,a gathering device movable into and out of the holder and also movablelengthwise of the form, and mechanism for inserting the gathering deviceinto the holder and then moving it, with the glass adhering thereto,lengthwise of the form.

2. In a sheet or plate glass forming apparatus, a holder for moltenglass, a form for shaping the sheet or plate of glass, a gatheringdevice movable into and out of the holder and also lengthwise over theform, and mechanism for dipping the gathering device into the holder,then raising it with the glass adhering thereto, and finally drawing it,with the glass, lengthwise over the form.

3. In a sheet or plate glass forming apparatus, a holder adapted toreceive molten-glass composition from a furnace, a glass-gatheringdevice insertible within the holder to become attached to themolten-glass composition, means to draw the gathering device from theholder over a form, producing a drawn sheet or plate of glass, and adevice adapted to blow a cool current upon the sheet or plate while inprocess of formation.

4. In a sheet or plate glass forming apparatus, a holder adapted toreceive molten-glass composition from a furnace, a glass-gatheringdevice insertible within the holder to become attached to themolten-glass composition, means to draw the gathering device from theholder over a form, producing a drawn sheet or plate of glass, and adevice adapted to blow jets of ignited inflammable vapor upon thecompleted sheet or plate of glass near its extremities, to release itfrom the mass of glass composition in the holder and also from thegathering and drawing device.

5. In a sheet or plate glass formingapparatus, the combination with aholder containing molten-glass composition, and a supported form, of agathering and drawing device insertible within the holder, mechanism formoving the gathering device over the form, and a device adapted toindent parallel scores near the side edges of the sheet or plate.

6. In a sheet or plate glass forming apparatus, the combination withmechanism adapted to drawa sheet or plate of glass from a mass ofmolten-glass composition, of a plurality of supported rotatablescoring-wheels, adapted to indent parallel grooves in the moving sheetor plate of glass near its side edges.

7. In a sheet or plate glass forming apparatus, the combination withmechanism adapted to draw a sheet or plate of glass from a mass ofmolten-glass composition contained in a holder, ot a forming-platesupported above the holder, a pair of shafts held to rotate across andabove the holder, one movable toward the other, and pairs ofscoring-wheels mounted upon said shafts and adapted to indent parallelgrooves in the moving sheet or plate of glass near its side edges.

8. In a sheet or plate glass forming apparatus,the combination withmechanism adapted to draw a sheet or plate of glass from a mass ofmolten-glass composition contained in a holder, of a form supportedabove and in sequence with the holder, to receive the drawn sheet orplate of glass, and a Huid-jet device adapted to project cool air uponthe sheet or plate of glass issuing from the holder, to reduce itstemperature.

9. In a sheet or plate glass forming apparatus, the combination with aholder containing molten-glass composition, a form adapted to receivethe glass, of a glass gathering and drawing frame movable lengthwise ofthe form, and mechanism adapted to progressively move the gathering anddrawing frame so as to insert it into the molten glass and subsequentlymove it lengthwise over the form to cause glass drawn by the frame totake shape from the form.

I0. In a sheet or plate glass forming apparatus, the combination with aholder containing molten glass, a supported form at one side of theholder, a glass gathering and drawing frame insertiblein the holder, andmechanism adapted to dip the gathering-frame in the holder andsubsequently move it over the form, of a scoring device for removingrough side edges of the glass sheet or plate while forming, and afluid-jet device adapted to blow cool air on the glass sheet or plate asit issues from the holder, and also to project jets of ignited gaseousvapor across the com- IOO IIO

pleted sheet or plate near its ends, to release said plate or sheet.

11. Inasheetorplateglassformingapparatus, a holder for molten glass, aform for shaping the sheet or plate of glass, said form having a convextop surface, a gathering device movable lengthwise over the form andprovided with acnrved gathering-bar, and means for dipping thegathering-bar into the holder, then raising it with the glass adheringthereto, and finally drawing it, with the glass, lengthwise over theform.

12. In asheet or plate glass forming apparatus, a glass gathering anddrawing device, comprising a gathering-bar having ears or projections atits ends, and means for operating said bar.

13. In a sheet or plate glass forming apparatus, the fluid-iet devicecomprising a conduittube, a tubular body at one end of saidconduit-tube, and foraminated on its inner side, a transverse jet-pipeforaminated along one side and pivotally attached to the opposite end ofthe conduit-tube, an air-supply, a gassupply to induet mixed air and gasthrough the conduit-tube into said body and jet-pipe, and valves for thecontrol of air and gas into and from said body and jet-pipe.

l-t. In a sheet or plate glass forming apparatus, the glass gatheringand drawing device, comprising a skeleton frame having a gathering-barat the lower part thereof, joined to side bars and a top bar, ears onthe ends of the gathering-bar, and means to connect the top bar withdrawing mechanism.

15. In asheet or plate glass forming apparatus, the combination with theglass gathering and drawing frame, of means to progressively move saidframe, comprising pairs of rotatably-supported sprocket-gears, asprocketchain engaging each alined pair of sprocketgears, a cross-barconnecting the chains, and aloose suspending connection between thecross-bar and gathering-frame.

, 16. In a sheet orplate glass forming apparatus, the combination with aglass gathering and drawing frame, comprising a curved gathering-har,side members and a top cross-bar, of a supported form having a convextop surface, and means to progressively move the gathering-frame overthe form, comprising two rotatable shafts held one at each end of theform,sprocket-gears on said shafts, alined in pairs, and asprocket-chain mounted on each pair of gears.

17. In a sheet or plate glass forming apparatus, the combination with aframe, and a support thereon, of a longitudinally-elongatedforming-plate, the top surface of which is in conformity with the shapeof the glass plate or sheet to be formed, a longitudinally-extended rackon the lower side of the formingplate, a rotatable cross-shaft on theframe, a pinion on the shaft adapted to mesh with the rack, and acrank-handle or the like at the outer end of said shaft.

18. In a sheet or plate `glass forming apparatus, the combination with aframe, boxing on the side members of the frame, adapted to slidelongitudinally, a rack above each box and connected thereto, a rotatabletransverse shaft held above the racks, spur-gears on the shaftrespectively meshing with one of the racks, and means to rock the shaft.

1). In a sheet or plate glass formingapparatus, the combination with aframe, boxes on the side members of said frame, one pair of boxes beingadapted to slide toward the other, a cross-shaft in each pair of boxes,said shafts being held in parallel planes, a rack attached upon eachslidable box, a rotatably-supported transverse shaft over the racks,spur-gears held on the shaft and respectively meshing with the racks,and means to rock said shaft.

20. In a sheet or plate glass forming apparatus, the sheet or platescoring device, comprising wheels secured oppositely in pairs uponrotatable transverse parallel shafts, one shaft being adapted to receiveadjustment toward and from the other shaft, and each pair ofscoring-wheels having a projecting rib formed ou the periphery of onewheel, and a mating groove formed in the periphery of the other wheel.

21. In a sheetor plate glass formingl apparatus, a holder for moltenglass, a frame having a slideway, a form movable in said slideway, meansfor sliding the form, and a gathering and drawing device for takingmolten glass from the holder and drawing it over the form.

22. In a sheet or plate glass forming apparatus, a holder for moltenglass, a gathering and drawing device for dipping into said holder andwithdrawing glass therefrom in the condition of a sheet, a form overwhich the gathering and drawing device is arranged to move lengthwise,and devices, located at the receiving end of the form and arranged toengage the glass sheet at the edges.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing Witnesses.

LAWRENCE H. DOLAN.

Witnesses:

CHAs. E. GooDRIcH, F. L. STONE.

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